package org.maltparser.core.syntaxgraph.feature;
import org.maltparser.core.exception.MaltChainedException;
import org.maltparser.core.feature.function.AddressFunction;
import org.maltparser.core.feature.function.FeatureFunction;
import org.maltparser.core.feature.value.FeatureValue;
import org.maltparser.core.feature.value.SingleFeatureValue;
import org.maltparser.core.io.dataformat.ColumnDescription;
import org.maltparser.core.symbol.SymbolTable;
import org.maltparser.core.symbol.SymbolTableHandler;
import org.maltparser.core.symbol.nullvalue.NullValues.NullValueId;
import org.maltparser.core.syntaxgraph.SyntaxGraphException;
import org.maltparser.core.syntaxgraph.node.DependencyNode;
public class ArcDirFeature implements FeatureFunction {
protected AddressFunction addressFunction;
protected SymbolTableHandler tableHandler;
protected SymbolTable table;
protected SingleFeatureValue featureValue;
public ArcDirFeature(SymbolTableHandler tableHandler) throws MaltChainedException {
super();
featureValue = new SingleFeatureValue(this);
setTableHandler(tableHandler);
}
/**
* Initialize the exists feature function
*
* @param arguments an array of arguments with the type returned by
* getParameterTypes()
* @throws MaltChainedException
*/
public void initialize(Object[] arguments) throws MaltChainedException {
if (arguments.length != 1) {
throw new SyntaxGraphException("Could not initialize ArcDirFeature: number of arguments are not correct. ");
}
// Checks that the two arguments are address functions
if (!(arguments[0] instanceof AddressFunction)) {
throw new SyntaxGraphException("Could not initialize ArcDirFeature: the first argument is not an address function. ");
}
setAddressFunction((AddressFunction) arguments[0]);
// Creates a symbol table called "ARCDIR" using one null value
setSymbolTable(tableHandler.addSymbolTable("ARCDIR", ColumnDescription.INPUT, "one"));
table.addSymbol("LEFT"); // The address exists
table.addSymbol("RIGHT"); // The address don't exists
}
/**
* Returns an array of class types used by the feature extraction system to
* invoke initialize with correct arguments.
*
* @return an array of class types
*/
public Class<?>[] getParameterTypes() {
Class<?>[] paramTypes = {org.maltparser.core.feature.function.AddressFunction.class};
return paramTypes;
}
/**
* Returns the string representation of the integer
* <code>code</code> according to the exists feature function.
*
* @param code the integer representation of the symbol
* @return the string representation of the integer
* <code>code</code> according to the exists feature function.
* @throws MaltChainedException
*/
public String getSymbol(int code) throws MaltChainedException {
return table.getSymbolCodeToString(code);
}
/**
* Returns the integer representation of the string
* <code>symbol</code> according to the exists feature function.
*
* @param symbol the string representation of the symbol
* @return the integer representation of the string
* <code>symbol</code> according to the exists feature function.
* @throws MaltChainedException
*/
public int getCode(String symbol) throws MaltChainedException {
return table.getSymbolStringToCode(symbol);
}
/**
* Cause the exists feature function to update the cardinality of the
* feature value.
*
* @throws MaltChainedException
*/
public void updateCardinality() {
// featureValue.setCardinality(table.getValueCounter());
}
/**
* Cause the feature function to update the feature value.
*
* @throws MaltChainedException
*/
public void update() throws MaltChainedException {
if (addressFunction.getAddressValue().getAddress() != null) {
final DependencyNode node = (DependencyNode) addressFunction.getAddressValue().getAddress();
if (!node.isRoot()) {
if (node.getHead().getIndex() < node.getIndex()) {
featureValue.setIndexCode(table.getSymbolStringToCode("LEFT"));
featureValue.setValue(1);
featureValue.setSymbol("LEFT");
featureValue.setNullValue(false);
} else {
featureValue.setIndexCode(table.getSymbolStringToCode("RIGHT"));
featureValue.setValue(1);
featureValue.setSymbol("RIGHT");
featureValue.setNullValue(false);
}
} else {
featureValue.setIndexCode(table.getNullValueCode(NullValueId.ROOT_NODE));
featureValue.setValue(1);
featureValue.setSymbol(table.getNullValueSymbol(NullValueId.ROOT_NODE));
featureValue.setNullValue(true);
}
} else {
featureValue.setIndexCode(table.getNullValueCode(NullValueId.NO_NODE));
featureValue.setValue(1);
featureValue.setSymbol(table.getNullValueSymbol(NullValueId.NO_NODE));
featureValue.setNullValue(true);
}
// featureValue.setKnown(true);
}
/**
* Returns the feature value
*
* @return the feature value
*/
public FeatureValue getFeatureValue() {
return featureValue;
}
/**
* Returns the symbol table used by the exists feature function
*
* @return the symbol table used by the exists feature function
*/
public SymbolTable getSymbolTable() {
return table;
}
/**
* Returns the address function
*
* @return the address function
*/
public AddressFunction getAddressFunction() {
return addressFunction;
}
/**
* Sets the address function
*
* @param addressFunction a address function
*/
public void setAddressFunction(AddressFunction addressFunction) {
this.addressFunction = addressFunction;
}
/**
* Returns symbol table handler
*
* @return a symbol table handler
*/
public SymbolTableHandler getTableHandler() {
return tableHandler;
}
/**
* Sets the symbol table handler
*
* @param tableHandler a symbol table handler
*/
public void setTableHandler(SymbolTableHandler tableHandler) {
this.tableHandler = tableHandler;
}
public int getType() {
return ColumnDescription.STRING;
}
public String getMapIdentifier() {
return getSymbolTable().getName();
}
/**
* Sets the symbol table used by the exists feature function
*
* @param table
*/
public void setSymbolTable(SymbolTable table) {
this.table = table;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
return obj.toString().equals(this.toString());
}
@Override
public int hashCode() {
return 217 + (null == toString() ? 0 : toString().hashCode());
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append("ArcDir(");
sb.append(addressFunction.toString());
sb.append(')');
return sb.toString();
}
}